Saw-jointer.



No. 864,907. PATENTBD SEPT. 3, 1907. J. G. MURBAGK.

SAW JOINTBR.

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JOHN G. MURBACK, OIF CATI-ILAMEl, WASHINGTON.

SAW-JOINTER.

Specification of Letters Patent. l

Patented Sept. 3, 1907.

l Application filed May 31,1907. serien No. 376,512.

To all whom it may concern:

Be it lcnown that l, JOHN G. MURBACK, a citizen of the United States, residing at Gathlamet, in the county oli W ahkiakum and State of Washington, have invented a new and Improved Saw-.lointer7 ol which the iiollowing is a speeilication.

Alter saws have been in use lor some time, their teeth become ol' unequal length, either because of unskilful liling or because some of the teeth are slightly harder than others. The cutting value of the saw is thereby diminished.

My improved saw jointer is adapted to hold a [ile or other cutting too] in such a manner that the ends of the teeth. can alllbe made true, when they can be properly sharpened.

My invention consists in a novel frame having adj ustable guides to contact with the saw, and means to grip the cutting tool.

It also consists in a novel l'rame having a guide to determine the height of the drag' teeth of the saw.

In the accompanying drawing, Figure l is an end view of my improved device. Fig. 2 is a cross section on the line 2*-2 oi Fig, 4i. Fig. 3 is a plan and Fig. 4 is a side View ol the device.

Similar reference characters refer to like parts through out the several views.

This device consists of a guide, a tool holder and a gage l'or the height et' drag teeth, all combined in one trame. The frame consists of parallel sides l. and top pieces 2 connecting the same. Projecting lugs 3 on the sides are adapted to hold the [ile 4 or other cutting tool, the thumb screws 5 being' provided for holding the file in place. As the tops of the lugs 3 are in a plane at right angles to-the sides, the bottom of the iile will always be at righ t angles .to the saw being jointed. The frame may be ol brass, iron or other desirable material.

To hold the sides of the frame parallel to the saw, I provide the guides 6, formed on one of the sides l, and having bearing edges parallel. to the sides. A thumb screw 7 is journaled in the side opposite the `guides 6,

being held in position bythe washer 8 and pin 9. A plate l0 is screwethreaded to iit the screw 7 and carries the pins ll. which are slidable in the side. The shoes .l2 on the ends ol the pins ll are adapted to contact with the saw. A nut i3 is used to lock the thumb screw 7. Y

The nut is loosen and the shoes l2 adjusted to contact lightly with the saw, so the frame may be moved along the saw with the file sliding on the points of the saw teeth, until all the points have been cut down to the same height v Spaced at Altervals among the teeth oi saws are drag teeth, which should be somewhat shorter than the cutting teeth and are intended to drag the saw-dust out oi the cut. The notches next the drag teeth are usually very large and deep.

lhe top pieces 2 of the frame are separated by a gap, and are connected by the cross bars 14. Resting on these cross bars in the gap is a plate l5, held in place by the screws 1G, and provided with a slot 17. This plate l5 can be raised to any desired height by placing thin strips between it and the cross bars 14. When the height of the drag teeth is to be diminished, the hle is removed and the frames so placed on the saw so that the drag teeth project through the slot 17, when they may be liled olif.

Having now explained my improvements, what l claim as my invention and desire to secure by Letters Patent is- In a saw lointer, the combination of a frame comprising a top and two sides, :in adjustable guide plate outside of one of the sides, a ,screw mounted in said side and adapted to position the `cuide plate, and guide pins carried b v said plate and extending through said side and adapted to Contact with the saw4 to position the jointer.

In testimony whereof l have signed this specification in the presence of two subscribing witnesses.

JOHN e. rfIUn'nAeK.

Witnesses 1 B n U en Po L wAnTH, A. PEARsoN. 

